namespace ZB.MOM.WW.OtOpcUa.Driver.Ab.Transport;

/// <summary>
///     The single <see cref="AbStatus"/> to OPC UA StatusCode table shared by <c>AbCipStatusMapper</c> and
///     <c>AbLegacyStatusMapper</c> (#580) — the two drivers used to carry identical copies.
/// </summary>
public static class AbOpcUaStatusMap
{
    /// <summary>OPC UA <c>Good</c>.</summary>
    public const uint Good = 0u;
    /// <summary>OPC UA <c>GoodMoreData</c>.</summary>
    public const uint GoodMoreData = 0x00A60000u;
    /// <summary>OPC UA <c>BadNodeIdUnknown</c>.</summary>
    public const uint BadNodeIdUnknown = 0x80340000u;
    /// <summary>OPC UA <c>BadNotWritable</c>.</summary>
    public const uint BadNotWritable = 0x803B0000u;
    /// <summary>OPC UA <c>BadOutOfRange</c>.</summary>
    public const uint BadOutOfRange = 0x803C0000u;
    /// <summary>OPC UA <c>BadNotSupported</c>.</summary>
    public const uint BadNotSupported = 0x803D0000u;
    /// <summary>OPC UA <c>BadDeviceFailure</c>.</summary>
    public const uint BadDeviceFailure = 0x808B0000u;
    /// <summary>OPC UA <c>BadCommunicationError</c>.</summary>
    public const uint BadCommunicationError = 0x80050000u;
    /// <summary>OPC UA <c>BadTimeout</c>.</summary>
    public const uint BadTimeout = 0x800A0000u;
    /// <summary>OPC UA <c>BadTypeMismatch</c>.</summary>
    public const uint BadTypeMismatch = 0x80740000u;

    /// <summary>Maps a transport-neutral <see cref="AbStatus"/> to an OPC UA StatusCode.</summary>
    /// <param name="status">The transport status.</param>
    /// <returns>The corresponding OPC UA status code.</returns>
    public static uint MapStatus(AbStatus status) => status switch
    {
        AbStatus.Ok => Good,
        AbStatus.Pending => GoodMoreData,
        AbStatus.Timeout => BadTimeout,
        AbStatus.NotFound => BadNodeIdUnknown,
        AbStatus.NotAllowed => BadNotWritable,
        AbStatus.OutOfBounds or AbStatus.TooLarge or AbStatus.TooSmall => BadOutOfRange,
        AbStatus.Unsupported => BadNotSupported,
        AbStatus.TypeMismatch => BadTypeMismatch,
        AbStatus.DeviceStateConflict => BadDeviceFailure,
        _ => BadCommunicationError, // BadConnection, BadReply, Partial, Abort
    };

    /// <summary>
    ///     Status for an exception thrown while creating / reading a tag: a transport exception maps through its
    ///     <see cref="AbStatus"/>; anything else is <see cref="BadCommunicationError"/>.
    /// </summary>
    /// <param name="ex">The exception.</param>
    /// <returns>The OPC UA status code.</returns>
    public static uint MapException(Exception ex) =>
        ex is AbTransportException ate ? MapStatus(ate.Status) : BadCommunicationError;
}